* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.scroll_box {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}
.scroll_box .cur {
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    background: url("imgs/不知火舞_绯月行.jpg") no-repeat center/cover;
}
.scroll_box .prev {
    overflow: hidden;
    position: absolute;
    top: 0;
    width: 100%;
    height: 0;
    z-index: 1;
}
.scroll_box .next {
    overflow: hidden;
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 0;
    z-index: 1;
}